Benefitting from Multiple weapon skill trees at once?

KallenXIII

So I'm not sure where the bug is or if this is intended, but I've been noticing that I'm benefitting from multiple weapon trees at the same time. To some degree that makes sense, if I'm using a greatsword and Longbow, getting a deadly finisher should give me the greatsword and bow buffs: Swordmasters Savagery and Bullseye. However, sometimes it doesn't give the greatsword buff, and unallocating swordmaster's savagery, saving, then reallocating it will let me get the buff again. Now where it get's weird is I have also leveled shortbow to 25, and while im using a longbow, sometimes I randomly benefit from ArrowStorm on the shortbow tree? I have no idea how to replicate this, or what causes it to randomly happen. So I finish a weapon combo, have Swordmaster, Heartseeker, Bullseye, and Arrowstorm? Then if I allocate a Longbow node, I lose all of them except the longbow tree nodes? There's something causing ghost allocations... I've had guildies report that having leveled the physical spell book, their sword attacks are applying chill while they now use a bow. So I suppose my question is, what on earth is intended here and what isn't? Are we supposed to benefit from every tree we've leveled and I'm sometimes not getting the benefits and that's the bug? Am I supposed to only benefit from equipped weapons? Or is me getting my greatsword buffs while using a Longbow the bug and I'm not supposed to get swordmaster's savagery at all?